The core Norstar Modular ICS can support up to two DTIs for a total of 48 T1 or ISDN-PRI (digital) lines. DTIs cannot be installed in Trunk Modules.
Requires either the Services Cartridge or the Combination Fiber 6-Port Services Cartridge
Compatible with the Modular ICS core only
The ISDN-PRI Enabler Soft Key is required in order to configure the Digital Trunk Cartridge (DTI Card) as a PRI card